Art of manufacturing tube-blanks.



No. 638,809. Patented Dec. I2, |899. E. E. GUIMBY.

ART UF MANUFACTURING TUBE BLANKS.

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no. 638,809." Patented nec. 12, |899. E. E. uumv.

ART 0F MANUFACTURING TUBE BLANKS.

(Application led Mar. 27, 1899.) I m0 Modem 2 sheets-sheer 2.

UNITED STATES PATENT OFFICE.

EDXVARD E. QUIMBY, OF ORANGE, NEW JERSEY, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE NATIONAL TUBE COMPANY, OF PITTSBURG,

PENNSYLVANIA.

ART OF MANUFACTURING TUBE-BLANKS.

SPECIFICATION forming part of Letters Patent No. 638,809, dated December 12, 18,99.

Application filed March 2'7. 1899. Serial No. 710,592. (No model.)

T0 @ZZ w/wm it may concern:

Be it known that I, EDWARD E. QUIMBY, of Orange, New Jersey, have invented certain Improvements in the Art of Manufacturing Tube-Blanks, of which the following is a specification.

These improvements relate to the art of manufacturing a tube-blank from a solid metallic billet by causing such billet, when suitably heated, to be pierced longitudinally by a stationary punch while the billet is contained in a moving` hollow die, as illustrated in the piercing apparatus shown and described in Emil F. Ilolingers pending application for Letters Patent of the United States, serially numbered 7 06,366. In such apparatus the die is the active and the punch the passive member of the piercing-couple. The carriage containing the die is forced downward by a hydraulic ram to effect the piercing operation and is subsequently raised by hydraulic pistons arranged beneath it. As the apparatus shown in the said IIolinger application is designed for the manufacture of hollow projectiles, it employs a hollow die which is interiorly shaped to conform to the cylindrical surface and the conoidally-pointed head of the projectile. The billet is prepared by having its lower end recessed to fit the upper end of the punch and is placed upon the punch before the carriage is lowered, the billet having been thus placed in position and the carriage lowered so that the die envelops the billet. A hydraulic ram, administering its downward thrust upon the top of the die, forces the metal of the billet to fill the upper end of the descending die and the annular space betweenthe surface of the stationary punch and the wall of the die. The modification of said apparatus by which it is made to contain the present invention embraces the substitut-ion of a tubular die or matrix for containing the billet, a telescopic ram for administering its downward stroke upon the top of the matrix and directly upon the upper end of the billet therein, and a removable chucking instrumentality for maintaining the inner member of the ram in fixed relation to the outer member,so that the lower end of such inner member is made to act as the middle portion of the Working face of the ram during a prescribed part of the downward stroke and then by the removal of said chucking instrumentality is permitted to yield. or remain stationary7 du ring the concluding part of the downward stroke while a disk of metal is being punched out of the top of the billet and into the mouth of the aperture in which the inner member of the ram is seated. The said disk of metal is subsequently dislodged by the act of pushing the inner member of the ram downward to its normal position after the ram has been raised a suitable distance above the matrix. The slidingvcarriage for supporting the matrix is proportioned with reference to containing matrices of different internal diameters for employment in connection with punches of different diameters.

A part of the present invention consists in making the telescopic ram easily separable from the hydraulic piston or reciprocating structure which drives it,to the end that when occasion arises for changing the size of the punch employed the telescopic ram can readily be removed and be replaced by another of appropriately different dimensions.

The accompanying drawings are as follows: Figure l is a front elevation, partly broken out and partly in section, showing the billet in place ready for the descent of the matrix.

Fig. 2 is a side elevation, partly broken out and partly in section, illustrating the stage in the-piercing operation at which it is necessary to release the inner member of the telescopic ram from the chucking-cam. Fig. 3 is a det-ail showing the chucking-cam fully dislodged from its chucking position and illustrating the final stage in the piercing operation. Fig. 4 is a transverse section taken through the plane indicated by the dotted line a; a; on Fig. l. Figs. 5 and G are details illustratingmodifications of the chucking instrumentality.

In the apparatus represented in the drawings there is contained, as shown, a hollow cylindrical matrix A, having a flange A', by means of which it is sustained in the reciprocable carriage B. The carriage is provided with vertical ribs B B,having the perforations B2 B2, adapting them to slide upon the IOO column BS B3, the lower ends of which are fastened to the bed-plate B4, while their upper ends are fastened to and supportthe main hydraulic cylinder C. The main hydraulic piston C is secured to a downward extension C2, provided at its lower end with the crosshead C2, adapted to slide upon the vertical columns B3 B3. Afixed to and projecting downwardly from the cross-head C3 is the hereinafter-described telescopic ram H, the working face of which is adapted to bear upon the top of the matrix A and directly upon the upper Vend of the billet contained in the matrix. The carriage B is also provided with laterally-projecting lugs D D, adapted to bear upon the upper ends of the vertical hydraulic pistons D D', seated in the hydraulic cylinders D2 D2. It will be understood that the hydraulic appliances are represented conventionally.

lVater under pressure is introduced into the lower ends of the cylinders D2 D2 when it is desired to elevate the carriage B and matrix A. Vhen it is desired to force Ithe carriage and matrix downward, water under pressure is introduced into the main hydraulic cylinder C, and at the same time the water is allowed to escape from the lowel` ends of the cylinders D2 D2. As the carriage descends the lower open end of the matrix A encounters and incloses the upper end of the billet E. The lower end of the billet is provided with the recess E and is seated upon the apex of the stationary piercing-punch F. A cross-head G, connected by n'ieans of vertical bolts G' G to the carriage B, is vertically perforated to loosely admit the punch F and its supporting-post F and constitutes the stripper for stripping the product from the punch.

The telescopic ram H consists of the tubular member a, detachably secured to any suitable carrier-as, for example, to the crosshead C55-in such wise as to facilitate its lateral adjustment for the purpose of accurately alining it with relation to the stationary piercing-punch F. A simple mode of providing for such adjustment is illustrated in the drawings, in which, as will be seen, the vertical bolt-holes Zi b in the flange ci are represented as of sufficiently large diameter to loosely contain the shanks of the fasteningscrews b b', inserted in the holes b2 b2, tapped in the cross-head C2, and provided with the jam-nuts 193122. If preferred, bolts extending entirely through the cross-head C3, as indicated by the dotted lines b b* in Fig. l, may

.be employed as the fastening devices instead of the screws b b. The lower end of the tubular member a constitutes the annular portion of the working face of the ram and is adapted to bear in part upon the upper end of the matrix A and in part directly upon the upper end oi' the billet E. The vertical aperture CZ of thetubular member CL is of the same diameter as that of the stationary piercingpunch F. The aperture d is counterbored at its upper end to afford the annular seat d' for the iianged head of the cylindrical plug e, seated with a sliding fit in the aperture d.

The lower end ot the plug e constitutes the inner portion e' of the working face of the ram' H so long as the plug e is maintained by any suitable chucking instrumentality in fixed appropriate relation to the tubular member o.. The two forms of @bucking instrumentality shown by way of illustration in the drawings each employ the chuck-cam f, adapted to swing between the side bars ff2 of the downward extension C2 of the main piston. In the form shown in Figs. 1, 2, 8, and 4 the camfis rigidly mounted upon the rock-shaft g, which is journaled in a relatively large bearing g in the side barf and in the relatively smaller bearing g2in the side bar f2. shaft is formed into a polygonal prism for insertion transversely through the head of the chuck-cam. The larger end of the rock-shaft projects outside the side barf and has secured to it the hub of the radius-arm 7L, by means of which the cam may be swung upon its axis. The smaller end of the rock-shaft g projects outside the side bar f2 and has secured to it a collar 7L to retain the rock-shaft in place.

The upper end of the chuck-cam is concentric with its axis and is seated in a correspondingly concentric bearing formed for convenience of construction in the bearingblock extending across the space between the upper portions of the side bars f f2. The object of the bearing for the upper part of the perimeter of the chuck-cam is to aord rigid support forthe cam when it is performing its chucking function.

In the modification shown in Figs. l, 2, and 3 the plug c is held to its work bythe bearing upon its head of the lower end of the chuckblock 7c, which is loosely seated in a vertical aperture 7a' in the cross-head C3, the diameter of which is just equal to the width of the space between the side bars f and f2. The chuck-block 7c is provided with winged iianges k2 k2, by means of which it is suspended in the aperture k'. At its upper extremity the chuckblock is provided with the slightly-concave face 7a2, adapting it to be closely engaged by the eccentric part 7a4 of the working face of the chuck-cam.

lVhen not in action, the top of the plug@ stands slightly below the lower end of the chuck-block 7s. The lower end of the plug c projects more or less below the plane of the under end of the tubular member a of the ram. The object of this construction is to afford an opportunity to relieve the chuck-cam from friction when, near the conclusion of the piercing operation,it becomes necessary to dislodge the chucking instrumentality, and thereby permit the punching out of a disk of metal from the upper end of the billet during the final part of the downward stroke of the niatrix, such relief being afforded by slightly The intermediate portion of the rock- IIO raising the carriage preparatory to dislod ging the chucking instrumentality and then res uming and completing the downward stroke of the matrix.

Figs. 5 and 6 exhibit two modifications, either or both of which may be employed. One modification consists in making the plug e and the chuck-block 7c in one piece, in which case provision is made for leaving a small gap between the eccentric Working face 7a4 of the cam and the concave top face .7c3 of the inner member of the telescopic ram when the cam is in working position. The face k3 is forced against the cam when the lower end of the plug e is pressing upon the billet, and, as in the previously-described modification, the cam is released from said pressure by slightly raising the die-carriage. The other modification consists in providing the chuck-cam with an outwardly and downwardly projecting arm Zand in loosely mounting the head of the cam upon a cylindrical shaft Z, inserted transversely through the side members f f2 of the downward extension C2 of the main piston. A screw-bolt Z2 serves to stop the cam in the right position to leave the gap referred to. The shaft Z is retained in position in any convenient manner-as, for example, by being provided with a head at one end and a collar at the other-the radius-arm h being in this case dispensed with. lt will be seen that during the concluding portion of the downward stroke the lower end of the hole in the tubular part of the ram performs the function of the female member of an ordinary die and punch. The disk of metal punched from the hot billet shrinks in cooling, and therefore can easily be dislodged from. the said female member after the die-carriage is raised sufficiently by swinging the chuck-cam inward, and thereby causing the paracentric part 795 of its working face to wedge the plug e downward. Such swinging -inward of the chuckcam may be eected by force exerted either manually or otherwise7 if required, upon the radius-arm h or upon the arm Z, as the case may be. v

If necessary, the chuck-cam may be forced inward positively during a part of the upward stroke of the piston by collision with a crossbar m, affixed to the columns B3 B3 and intersecting the path of bodily upward motion of the radius-arm Zt or the armZ or a projection m', formed upon the edge of the chuck-cam, as shown in Fig. 2.

It is to be understood that the details of construction which are herein shown may be varied in form without departure from the invention, the principal feature of which con-- sists in the combination of the telescopic ram with any suitable removable chuckin g instrumentality for maintaining the inner cylindrical member of the ram in fixed relation to the tubular member during a prescribed part of the billet-piercing operation.

What is claimed as the invention is-- l. In a piercing-press, a stationary vertical punch, a reciprocable matrix, a telescopic ram composed of a cylindricalinner member and a tubular outer member, and a movable chucking instrumentality for maintaining the inner member of said telescopic ram in fixed relation to the tubular member thereof during a prescribed part of the piercing operation.

2. The combination ina piercingpress,substantially such as described, of a telescopic ram composed of a cylindrical inner member and a tubular outer member; a movable chucking instrumentality for maintaining the inner member of said telescopic ram in fixed relation to the outer member thereof during a prescribed part of the piercing operation, and means for forcing said inner member of the telescopic ram downward after the conclusion of the piercing and punching operation, substantially as and for the purposes set forth.

3. The combination, in a piercing-press, of a stationary vertical punch; a reciprocable matrix; a telescopic ram for bearing upon the top of the matrix and upon the end of a billet contained within said matrix, and a movable chucking instrumentality for forcing the interior member of said telescopic ram downward into its working position, and for subsequently maintaining the same in xed relation to the tubular member of said telescopic ram duringaprescribed part of the descending stroke of the ram and matrix.

4. In a piercing-press, substantially of the character set forth, a telescopic ram detachably secured to and extending downwardly from, a suitable carrier; a hydraulic piston adapted to work in a vertical path above said carrier, and a rigid connection between said piston and said carrier.

5, In a piercing-press, substantially such as described, a stationary vertical piercingpunch; a vertically-reciprocable matrix; a hydraulic piston for furnishing the force to drive downward said matrix, together with a billet therein contained; a downward extension of said piston, and a telescopic ram hadj ustably secured to the lower extremity of said extension.

EDV. E. QUIMBY.

lVitnesses:

STEPHEN S. PRICE, A. M. JONES.

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